This makes glassmaking more challenging, as glass that is quenched
when not molded, or left wandering too long, will tend to quench to
crude glass, which is inferior.
This also prevents molten glass from wandering the countryside
forever from failed glassmaking attempts, and precludes keeping
molten glass in "captivity" as a crude infinite light source.
It should now be possible to obtain the new optical stuff given
only resources in-game. The molten glass casting process, in
particular, should be at least a little interesing.
These recipes aren't very interesting and may be subject to
refinements in the future.
